Silvanus's Invoker, and Gaea's Cradle

Prerequisites

• Silvanus's Invoker on the battlefield
• Gaea's Cradle on the battlefield
• You control at least nine creatures

Steps

1. Activate Gaea's Cradle by tapping it, adding at least nine
2. Activate Silvanus's Invoker by paying , causing Gaea's Cradle to become a 8/8 Elemental with haste, and untapping Gaea's Cradle
3. Repeat

Results

• Infinite mana lands you control can produce
• Infinite untap of lands you control